Acetylene-gas generator.



J. A. & T. N. JOHNSON.

ACETYLENE GAS GENERATOR.

APPLICATION FILED SEPT. 12, 1914.-

'Patented Apr. 18.1916.

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Vrin/#wea THB COLUMBIA PLANOURAPH co., WASHXNGTGN. D. C.'

UNITED srnfrns PATENT FIO.

JOHN A. JOHNSON, OF CRAWFORDSVILLE, AND THEODORE N. JOHNSON, OF WAVELAND,

INDIANA, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, T0 JOHNSON AOETY- LENE GAS COMPANY, OF CRAWFORDSVILLE, INDIANA, A. CORPORATION.

ACETYLENE-GAS GENERATOR.

Specification of Letters Patent.

Patented Apr. 18, 1916.

Application led September 12, 1914. Serial No. 861,399.

To all 'whom z5 may concern:

Be it known that we, JOHN A. JOHNSON and THEODORE N. JOHNSON, citizens of the United States, residing at Crawfordsville and lVaveland, respectively, in the county of Montgomery `and State of Indiana, have invented certain new and useful Improvements in Acetylene-Gas Generators, of which the following is a specification.

This invention relates to that class of acetylene gas` generators wherein vthe rise and fall of the water-sealed hood inclosing the carbid holding receptacle actuates the valve which controls the flow of carbid into the generating chamber, the construction herein shown and described being different from that shown and described in our former Letters Patent of the United States No. 1,130,906 issued March 9., 1915.

The hereinabove mentioned generators, in some instances, are constructed so that the hood and gas-bell are joined and moved together, so that considerable gas is necessary to provide thebuoyancy for overcoming the combined weight of the hood and bell, so that the action of the valve is dclayed, thereby allowing an excessive amount of carbid to flow into the generating chamber and producing an excessive amount of gas over and above the capacity of the machine. This is both expensive and dangerous, expensive because the excessive amount of gas finds its way to the outside and is lost, and dangerousbecause leakage of gas is liable at any time to bring disaster.

The object of this invention is to provide means whereby the buoyancy of the initially generated gas will initially cause the hood to rise a short distance independently of the gas-bell, sothat the said valve is closed and further flow of carbid discontinued at a time when a quantity of carbid will have been discharged to provide a volume of gas within the capacity of the machine.

We accomplish the above object of the invention by means of the construction illustrated in the accompanying drawings, forming a part hereof, in which- Figure 1 is a central vertical section through a complete acetylene gas generator, showing our invention in operative position. Fig. 2 is a fragmentary detail view in side elevation of the hoodl and gas-bell,

showing our improved connection between said hood and bell, on the dotted line 2-2 in Fig. 1.

Referring to the drawings, the generator contemplates the use of the usual casing 10, whlch is divided centrally by a transverse division wall 1l which terminates in a vertically disposed neck 12. The upper end of the neck 12 supports the usual carbid holding receptacle 15. The water above the division wall 11v forms a water-seal for the lower end of the usual gas-bell 20 and the hood 22 which incloses the carbid-receptacle 15 and prevents leakage of gas around said receptacle. Vhen the gas is initially generated in the generating-chamber 25 the gas immediately rises and passes up through the neck 12 and apertures 13 and accumulates within the hood 22, for the reason that sufiicient gas within the generatingchamber must be generated to break the water-seal in the stand-pipe 27 before the gas can gain access to the interior of the gas-bell 20. In that class of generators in which the bell and hood move in unison there is al combined weight which must be overcome before the hood is moved out of contact with the mechanism. which actuates the valve in the discharge opening of the carbid holding receptacle, so that by the time the valve is released an excessive amount of carbid has been discharged into the generating-chamber to produce an amount of gas in excess of the capacity of the machine. This feature is sought to be remedied by those Working in this art for the reason that the waste of gas means a higher cost of operation, and through this waste, through leakage, there is always danger of accidents caused through premature explosions.

It will be noted in examining our construction, that the gas initially generated immediately begins to act upon the hood 22 for the reason that initially the latter is free of interference in its movements, so that only a small amount of gas is necessary to elevate it and move it out of contact with the mechanism that controls the movement of the valve in the discharge end of the carbid holding receptacle. At this time, when the valve closes the discharge opening in the carbid holding receptacle, suflicient carbid will have been discharged into the generating-chamber to produce sufcient gas the buoyancy of which, and having the hood cured by means of a pair of uprights 30V which are secured to the bell on opposite sides of the hood. As shown, the uprights 30 extend upwardly and parallel with the outer surface of the hood 22, and near the upperr ends of the uprights 30 elongated slots 32 are provided which engage with a pair of horizontally projecting lugs 38 formed integrally with the top of the hood 22. By means of this construction it will be observed that the gas intially generated will elevate the hood 22 a sufficient distance to release the valve controlling the discharge opening in the carbid holding receptacle before the lugs 33 engage the upper edges of the elongated slots 32, after which the hood 22 and gas-bell 20 are moved upwardly at the same time. This is quite an advantage, as has heretofore been set forth, for the reason that the hood 22 is more easily aected through the buoyancy of the gas than the bell 20, and as the valve in the discharge end of the carbid holding receptacle is actuated by the former the accuracy of its action is more readily determined and maintained.

The gas in passing out of the bell 20 enters the top of the pipe 40 and after passing downward through said pipe enters the service pipe 4l. The pipe 40 is considerably enlarged to afford room for a suitable porous material for extracting and collecting moisture from the gas as it passes toward the service pipe, and as the water vcondenses within the pipe 40 it drains to the bottom and passes out through the drain pipe 42 and is discharged eXteriorly of the casing 10.

Having thus fully described our said invention, what we desire to secure by Letters Patent, is-

l. 'In an acetylene gas generator, the combination, of a gas generating chamber, a carbid holding receptacle arranged with its discharge end toward said chamber, a water sealed gas bell, a water sealed means arranged within said gas bell and communicating lwith said generating chamber, a water sealed hood inclosing said carbid holding receptacle, and connecting means between said hood and gas bell allowing said hood to be raised initially a prescribed distance independently of said gas bell.

2. In an acetylene gas generator, the combination, of a generating chamber, a carbid holding receptacle, a gas bell for storing gas, a pair of uprights secured to and moving with said bell and extending upwardly along the opposite sides of said hood, and means carried by said hood and forming connections with said uprights for permitting said hood to intially move a prescribed distance independently of said bell. In witness whereof, we have hereunto set our hands and seals at Crawfordsville, Indiana, this 7th day of September, A. D. one thousand nine hundred and fourteen.

JOHN A. JOHNSON. [L.S.] THEODORE N. JOHNSON. [1.. 5.] Witnesses:

CHARLES M. Davis, Hons TOBIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

